Operating instructions

51D0528
13
LX Series Direct Vent Gas Fireplace

There are two basic types of direct-vent installation:
• Horizontal Termination
• Vertical Termination
It is important to select the proper length of vent pipe for
the type of termination you choose. It is also important to
note the wall thickness.

Select the amount of vertical rise desired. All horizontal
run of venting must have minimum 1/4" rise for every 12"
of run towards the termination.
You may use up to three 90° elbows in this vent congura-
tion. Refer to Horizontal (Through the Wall) Termination
Congurations on Page 18.

Measure the distance from the replace oor to the ceil-
ing. Add the ceiling thickness, the vertical rise in an attic
or second story, and allow for sufcient vent height above
the roof line.
 You may use two 45° elbows in place of a 90° elbow.
You must follow rise to run ratios when using 45° elbows.
The appliance is approved for use with three 90° elbows
maximum or a combination of 90° and 45° elbows up to
a maximum of 270°.
For two-story applications, restops are required at each
oor level. If an offset is needed in the attic, additional pipe
and elbows will be required.
You may use a chase with a vent termination with exposed
pipe on the exterior of the house. See Installing Vent
System in a Chase below. If pipe is enclosed in chase, it
is not exposed.
It is very important that the venting system maintain its bal-
ance between the combustion air intake and the ue gas
exhaust. Certain limitations apply to vent congurations
and must be strictly followed.

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    
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
      

      
    
    


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
       
     
     
      

   
    
 
          





     




A chase is a vertical boxlike structure built to enclose
venting that runs along the outside of a building. A chase
is required for such venting.